/**
 * Cesium - https://github.com/AnalyticalGraphicsInc/cesium
 *
 * Copyright 2011-2017 Cesium Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Columbus View (Pat. Pend.)
 *
 * Portions licensed separately.
 * See https://github.com/AnalyticalGraphicsInc/cesium/blob/master/LICENSE.md for full licensing details.
 */
define(['exports', './when-8d13db60', './Check-70bec281', './BoundingSphere-51445700'], function (exports, when, Check, BoundingSphere) { 'use strict';

    /**
         * Geometry instancing allows one {@link Geometry} object to be positions in several
         * different locations and colored uniquely.  For example, one {@link BoxGeometry} can
         * be instanced several times, each with a different <code>modelMatrix</code> to change
         * its position, rotation, and scale.
         *
         * @alias GeometryInstance
         * @constructor
         *
         * @param {Object} options Object with the following properties:
         * @param {Geometry} options.geometry The geometry to instance.
         * @param {Matrix4} [options.modelMatrix=Matrix4.IDENTITY] The model matrix that transforms to transform the geometry from model to world coordinates.
         * @param {Object} [options.id] A user-defined object to return when the instance is picked with {@link Scene#pick} or get/set per-instance attributes with {@link Primitive#getGeometryInstanceAttributes}.
         * @param {Object} [options.attributes] Per-instance attributes like a show or color attribute shown in the example below.
         *
         *
         * @example
         * // Create geometry for a box, and two instances that refer to it.
         * // One instance positions the box on the bottom and colored aqua.
         * // The other instance positions the box on the top and color white.
         * var geometry = Cesium.BoxGeometry.fromDimensions({
         *   vertexFormat : Cesium.VertexFormat.POSITION_AND_NORMAL,
         *   dimensions : new Cesium.Cartesian3(1000000.0, 1000000.0, 500000.0)
         * });
         * var instanceBottom = new Cesium.GeometryInstance({
         *   geometry : geometry,
         *   modelMatrix : Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
         *     Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883)), new Cesium.Cartesian3(0.0, 0.0, 1000000.0), new Cesium.Matrix4()),
         *   attributes : {
         *     color : Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.AQUA)
         *   },
         *   id : 'bottom'
         * });
         * var instanceTop = new Cesium.GeometryInstance({
         *   geometry : geometry,
         *   modelMatrix : Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
         *     Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883)), new Cesium.Cartesian3(0.0, 0.0, 3000000.0), new Cesium.Matrix4()),
         *   attributes : {
         *     color : Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.AQUA)
         *   },
         *   id : 'top'
         * });
         *
         * @see Geometry
         */
        function GeometryInstance(options) {
            options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);

            //>>includeStart('debug', pragmas.debug);
            if (!when.defined(options.geometry)) {
                throw new Check.DeveloperError('options.geometry is required.');
            }
            //>>includeEnd('debug');

            /**
             * The geometry being instanced.
             *
             * @type Geometry
             *
             * @default undefined
             */
            this.geometry = options.geometry;

            /**
             * The 4x4 transformation matrix that transforms the geometry from model to world coordinates.
             * When this is the identity matrix, the geometry is drawn in world coordinates, i.e., Earth's WGS84 coordinates.
             * Local reference frames can be used by providing a different transformation matrix, like that returned
             * by {@link Transforms.eastNorthUpToFixedFrame}.
             *
             * @type Matrix4
             *
             * @default Matrix4.IDENTITY
             */
            this.modelMatrix = BoundingSphere.Matrix4.clone(when.defaultValue(options.modelMatrix, BoundingSphere.Matrix4.IDENTITY));

            /**
             * User-defined object returned when the instance is picked or used to get/set per-instance attributes.
             *
             * @type Object
             *
             * @default undefined
             *
             * @see Scene#pick
             * @see Primitive#getGeometryInstanceAttributes
             */
            this.id = options.id;

            /**
             * Used for picking primitives that wrap geometry instances.
             *
             * @private
             */
            this.pickPrimitive = options.pickPrimitive;

            /**
             * Per-instance attributes like {@link ColorGeometryInstanceAttribute} or {@link ShowGeometryInstanceAttribute}.
             * {@link Geometry} attributes varying per vertex; these attributes are constant for the entire instance.
             *
             * @type Object
             *
             * @default undefined
             */
            this.attributes = when.defaultValue(options.attributes, {});

            /**
             * @private
             */
            this.westHemisphereGeometry = undefined;
            /**
             * @private
             */
            this.eastHemisphereGeometry = undefined;
        }

    exports.GeometryInstance = GeometryInstance;

});
